JOHNSON CONTROLS
99
SECTION 7 – MAINTENANCE
FORM 155.33-ICOM2.EN.GB
ISSUE DATE:12/4/2017
7
23. Watch the liquid level in the absorber while the
solution pump runs.
24. After 30 min., press the Forced Dilution
OFF
but-
ton.
25. Set the temperature controllers to automatic mode
for the:
a. waste exhaust gas
b. waste hot water.
26. Press the Refrigerant Pump
Auto
button.
27. Return the valve cap. There is an O-ring between
the cap and valve. When fitting the cap, make sure
that the O-ring is set normally.
PRECAUTIONS FOR DECRYSTALLIZATION
• Cycle the chilled / hot water pump and the cooling
water pump off and on during the melting process.
• Remove any sensors that are sensitive to heat be-
fore you start the melting operation. The tempera-
ture of the chilled / hot water and cooling water
that remains in the absorption chiller-heater may
rise to about 70°C.
• When you start the chiller-heater after melting the
crystals, discharge the chilled / hot water and the
cooling water first. If that water is left in the ma
-
chine, the paint on the inside walls may be peeled
off. The filling material of the cooling tower may
be deformed due to the heat.
MAINTENANCE ITEMS
Maintenance and inspection items along with standard
inspection periods are shown in the next table. For de-
tails, contact your local Johnson Controls Service Cen-
ter.
Inspection frequency may be adjusted according to the
actual operating conditions.
TABLE 19 -
MAINTENANCE AND INSPECTION
TASK
CONTENTS
FREQUENCY
SCOPE
Recording of operation data
Collect the operation data (Refer to
155.33-CL1
) and
check the data with the data collected during the factory
test.
Weekly
C
Furnace Inspection
1. Open the inlet and outlet inspection windows of the
waste exhaust gas-driven generator (XG).
2. Inspect and clean inside the waste exhaust gas-driven
generator.
Every 4,000 hours
S
Check of liquid level
See
Table 36 on page 99
. Check the liquid level at each
part.
Daily
C
Refining of refrigerant
Refrigerant Refining Method on page 97
. Refine
the refrigerant.
Every 2-3 weeks
S
Manual purging from
purging tank
condensable gas from the absorber.
Every 2-3 months.
S
Manual purging from
absorber
S
Replacement of oil in
vacuum pump
Replace the oil in the vacuum pump.
Monthly
C
Check Vacuum Pump
After you replace the oil in the vacuum pump, be sure to
pull the pulley belt and check the smooth motion of the
pulley.
C
Appearance check
Check the outside of the unit for damage (e.g., leakage for
chilled / hot water and cooling water, rusting, etc.). Check
the solution pump and refrigerant pump for abnormal
sounds and vibration.
C
C = Customer, S = Johnson Controls Service
